1
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Maure A, Lawarée E, Fiorentino F, Pawlik A, Gona S, Giraud-Gatineau A, Eldridge MJG, Danckaert A, Hardy D, Frigui W, Keck C, Gutierrez C, Neyrolles O, Aulner N, Mai A, Hamon M, Barreiro LB, Brodin P, Brosch R, Rotili D, Tailleux L. A host-directed oxadiazole compound potentiates antituberculosis treatment via zinc poisoning in human macrophages and in a mouse model of infection. PLoS Biol 2024; 22:e3002259. [PMID: 38683873 PMCID: PMC11081512 DOI: 10.1371/journal.pbio.3002259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 05/09/2024] [Accepted: 03/13/2024] [Indexed: 05/02/2024] Open
Abstract
Antituberculosis drugs, mostly developed over 60 years ago, combined with a poorly effective vaccine, have failed to eradicate tuberculosis. More worryingly, multiresistant strains of Mycobacterium tuberculosis (MTB) are constantly emerging. Innovative strategies are thus urgently needed to improve tuberculosis treatment. Recently, host-directed therapy has emerged as a promising strategy to be used in adjunct with existing or future antibiotics, by improving innate immunity or limiting immunopathology. Here, using high-content imaging, we identified novel 1,2,4-oxadiazole-based compounds, which allow human macrophages to control MTB replication. Genome-wide gene expression analysis revealed that these molecules induced zinc remobilization inside cells, resulting in bacterial zinc intoxication. More importantly, we also demonstrated that, upon treatment with these novel compounds, MTB became even more sensitive to antituberculosis drugs, in vitro and in vivo, in a mouse model of tuberculosis. Manipulation of heavy metal homeostasis holds thus great promise to be exploited to develop host-directed therapeutic interventions.
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Affiliation(s)
- Alexandra Maure
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Emeline Lawarée
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Francesco Fiorentino
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Alexandre Pawlik
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Saideep Gona
- Department of Genetic Medicine, University of Chicago, Chicago, Illinois, United States of America
| | | | | | - Anne Danckaert
- Institut Pasteur, Université Paris Cité, UTechS BioImaging-C2RT, Paris, France
| | - David Hardy
- Institut Pasteur, Université Paris Cité, Histopathology Platform, Paris, France
| | - Wafa Frigui
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Camille Keck
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Claude Gutierrez
- Institut de Pharmacologie et de Biologie Structurale, IPBS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Olivier Neyrolles
- Institut de Pharmacologie et de Biologie Structurale, IPBS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Nathalie Aulner
- Institut Pasteur, Université Paris Cité, UTechS BioImaging-C2RT, Paris, France
| | - Antonello Mai
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
- Pasteur Institute, Cenci-bolognetti Foundation, Sapienza University of Rome, Rome, Italy
| | - Mélanie Hamon
- Institut Pasteur, Université Paris Cité, Chromatine et Infection unit, Paris, France
| | - Luis B. Barreiro
- Department of Genetic Medicine, University of Chicago, Chicago, Illinois, United States of America
| | - Priscille Brodin
- Université de Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Roland Brosch
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
| | - Dante Rotili
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, Rome, Italy
| | - Ludovic Tailleux
- Institut Pasteur, Université Paris Cité, CNRS UMR 6047, Unit for Integrated Mycobacterial Pathogenomics, Paris, France
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2
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Sanchez L, Lensen A, Connor MG, Hamon M, Enninga J, Valenzuela C. Shigella generates distinct IAM subpopulations during epithelial cell invasion to promote efficient intracellular niche formation. Eur J Cell Biol 2024; 103:151381. [PMID: 38183814 DOI: 10.1016/j.ejcb.2023.151381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 12/20/2023] [Accepted: 12/24/2023] [Indexed: 01/08/2024] Open
Abstract
The facultative intracellular pathogen Shigella flexneri invades non-phagocytic epithelial gut cells. Through a syringe-like apparatus called type 3 secretion system, it injects effector proteins into the host cell triggering actin rearrangements leading to its uptake within a tight vacuole, termed the bacterial-containing vacuole (BCV). Simultaneously, Shigella induces the formation of large vesicles around the entry site, which we refer to as infection-associated macropinosomes (IAMs). After entry, Shigella ruptures the BCV and escapes into the host cytosol by disassembling the BCV remnants. Previously, IAM formation has been shown to be required for efficient BCV escape, but the molecular events associated with BCV disassembly have remained unclear. To identify host components required for BCV disassembly, we performed a microscopy-based screen to monitor the recruitment of BAR domain-containing proteins, which are a family of host proteins involved in membrane shaping and sensing (e.g. endocytosis and recycling) during Shigella epithelial cell invasion. We identified endosomal recycling BAR protein Sorting Nexin-8 (SNX8) localized to IAMs in a PI(3)P-dependent manner before BCV disassembly. At least two distinct IAM subpopulations around the BCV were found, either being recycled back to cellular compartments such as the plasma membrane or transitioning to become RAB11A positive "contact-IAMs" involved in promoting BCV rupture. The IAM subpopulation duality was marked by the exclusive recruitment of either SNX8 or RAB11A. Hindering PI(3)P production at the IAMs led to an inhibition of SNX8 recruitment at these compartments and delayed both, the step of BCV rupture time and successful BCV disassembly. Finally, siRNA depletion of SNX8 accelerated BCV rupture and unpeeling of BCV remnants, indicating that SNX8 is involved in controlling the timing of the cytosolic release. Overall, our work sheds light on how Shigella establishes its intracellular niche through the subversion of a specific set of IAMs.
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Affiliation(s)
- Lisa Sanchez
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Dynamics of Host-Pathogen Interactions Unit, 75015 Paris, France
| | - Arthur Lensen
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Dynamics of Host-Pathogen Interactions Unit, 75015 Paris, France
| | - Michael G Connor
- Institut Pasteur, Université Paris Cité, Chromatin and Infection Unit, 75015 Paris, France
| | - Mélanie Hamon
- Institut Pasteur, Université Paris Cité, Chromatin and Infection Unit, 75015 Paris, France
| | - Jost Enninga
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Dynamics of Host-Pathogen Interactions Unit, 75015 Paris, France.
| | - Camila Valenzuela
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Dynamics of Host-Pathogen Interactions Unit, 75015 Paris, France.
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3
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Thibault A, Hamon M, Jossier R, Wyrzykowski B, Haudiquet P. Osteochondritis dissecans of the vertebral endplate of C5 with concomitant C4-C5 disc protrusion in a French Bulldog. J Small Anim Pract 2023; 64:801-805. [PMID: 37475135 DOI: 10.1111/jsap.13653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 05/06/2023] [Accepted: 06/29/2023] [Indexed: 07/22/2023]
Abstract
A 4-year-old French bulldog was presented with neck pain and left forelimb lameness. CT scan revealed a bony defect in the craniodorsal rim of the endplate of C5 with a concomitant disc protrusion leading to ventral spinal cord compression. Ventral slot at C4-C5 was performed to remove the protruding material and the fragment. Based on CT and histological findings, this bone defect was consistent with osteochondritis dissecans. Neck pain was absent immediately after the operation and the dog recovered without complication. Only a slight proprioceptive deficit of the left forelimb persisted during the 6-month of follow-up. Based on our search of the veterinary literature, this is the first published report of an osteochondritis dissecans of cervical endplate treated surgically.
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Affiliation(s)
- A Thibault
- VETREF-ANICURA Clinique vétérinaire de référés, 7 Rue James Watt, Angers-Beaucouzé, 49070, France
| | - M Hamon
- VETREF-ANICURA Clinique vétérinaire de référés, 7 Rue James Watt, Angers-Beaucouzé, 49070, France
| | - R Jossier
- VETREF-ANICURA Clinique vétérinaire de référés, 7 Rue James Watt, Angers-Beaucouzé, 49070, France
| | - B Wyrzykowski
- LAPV Amboise, laboratoire d'anatomie pathologique vétérinaire, 6 Impasse de Vilvent, Nazelles-Négron, 37530, France
| | - P Haudiquet
- VETREF-ANICURA Clinique vétérinaire de référés, 7 Rue James Watt, Angers-Beaucouzé, 49070, France
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4
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Gronsfeld V, Bouvy B, Hamon M, Balligand M, Picavet PP. Surgical repair of Salter-Harris type II fracture of the distal humerus: short and long-term outcomes in a case series of three dogs and one cat. N Z Vet J 2023; 71:337-343. [PMID: 37555295 DOI: 10.1080/00480169.2023.2246424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 07/31/2023] [Indexed: 08/10/2023]
Abstract
CASE HISTORIES Three dogs and one cat sustained forelimb trauma and were presented to a university veterinary clinic (Liège, Belgium) and a private veterinary hospital (Beacouzé, France). All four animals were referred for surgery. CLINICAL FINDINGS Two dogs and the cat were ambulatory on admission but unable to bear weight on the affected limb. One dog was non-ambulatory and lacked voluntary movement and sensation in one forelimb. Salter-Harris type II fractures of the distal humerus were diagnosed by radiography in all cases; avulsion of the brachial plexus and pelvic fractures were also present in the non-ambulatory dog. TREATMENT AND OUTCOME All Salter-Harris type II fractures were stabilised by open reduction and internal fixation with cross pins. One minor complication (seroma) and three major complications (implant migration) developed after surgery. The pins were completely removed in one case and partially removed in two cases to resolve these complications. At the final follow-up examination (12-31 months after surgery), owners reported no lameness in three of the four cases and grade 2/5 left forelimb lameness in one case. CLINICAL RELEVANCE This type of fracture is rarely described in the literature; however, it should be included in the differential diagnoses of traumatic humeral fractures in growing dogs and cats. In this case series, we achieved fair-to-excellent short-term and long-term outcomes after osteosynthesis of Salter-Harris type II fractures by cross pinning.
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Affiliation(s)
- V Gronsfeld
- Department of Small Animal Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - B Bouvy
- Department of Small Animal Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Hamon
- Department of Small Animal Surgery, VetRef, Beaucouzé, France
| | - M Balligand
- Department of Small Animal Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - P P Picavet
- Department of Small Animal Surgery, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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5
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Picavet PP, Hamon M, Etienne AL, Guieu LV, Claeys S, Billen F, Noël S. Laryngeal paralysis secondary to cervical bite injuries in five dogs. N Z Vet J 2021; 70:109-118. [PMID: 34213388 DOI: 10.1080/00480169.2021.1951865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
CASE HISTORIES Medical records of a veterinary hospital in Belgium were reviewed for dogs (n = 5) that presented between 2016 and 2019 with laryngeal paralysis secondary to bite wounds to the cervical region received while fighting with other dogs. The time elapsed between the trauma and presentation was from a few hours up to 5 days. CLINICAL FINDINGS AND TREATMENT Bilateral laryngeal paralysis was identified in three dogs and unilateral laryngeal paralysis in two dogs via endoscopic assessment of laryngeal function. The primary concomitant lesions included tracheal injury in 3/5 dogs and oesophageal injury in 1/5 dogs. One dog with bilateral laryngeal paralysis was treated medically as no signs of dyspnoea were present. Surgical management was elected in 4/5 dogs based on evaluation of their clinical status and lesions revealed by endoscopic examination of upper gastrointestinal and respiratory tracts. Dogs underwent surgical procedures that were determined to be appropriate for treatment of the lesions identified on clinical examination, diagnostic imaging, and endoscopy. The cervical region was explored through a ventral midline approach in 2/4 cases, to close tracheal perforations. Temporary tracheostomy was performed in 2/4 cases. Procedures to correct brachycephalic airway obstructive syndrome were performed in 2/4 cases. Cricoarytenoid lateralisation was performed in 2/4 dogs. Dogs were hospitalised for 2-10 days and received antimicrobial therapy before surgery and for 2-3 weeks after surgery. Physical examination and respiratory function were normal in 3/5 dogs 4-6 months after discharge. Information regarding outcomes for two cases was obtained from the owners by telephone assessment 1-6 months after surgery. The owner of each dog reported the respiratory function to be excellent. DIAGNOSIS Uni- or bilateral, transient or permanent laryngeal paralysis with concomitant oesophageal, tracheal, or laryngeal lesions following cervical dog bite injuries diagnosed by endoscopic examination of upper gastrointestinal and respiratory tracts. CLINICAL RELEVANCE This case series describes the diagnosis and management of dogs with laryngeal paralysis secondary to cervical dog bite injuries. To the authors' knowledge, this is the first published report documenting bilateral laryngeal paralysis secondary to cervical dog bite injuries. Clinicians should be aware of this pathology and the importance of investigating laryngeal function in dogs presenting with cervical bites, particularly those with inspiratory dyspnoea. Upper airway and digestive endoscopy are recommended for complete assessment of cervical traumatic injuries.
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Affiliation(s)
- P P Picavet
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Hamon
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - A-L Etienne
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - L-V Guieu
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN, USA
| | - S Claeys
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - F Billen
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - S Noël
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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Laurent C, Hamon M, Syrykh C, Adélaï J, Guille A, Parrens M, Dartigues P, Bardet A, Mescam L, Schiano De Colella J, Sujobert P, Besson C, Birnbaum D, Xerri L. RESISTANCE OF B‐CELL LYMPHOMAS TO CAR‐T CELL THERAPY IS ASSOCIATED WITH HISTOPHENOTYPICAL AND GENOMIC TUMOR CHANGES WHICH CAN INDUCE PROFOUND TRANS‐DIFFERENTIATION. Hematol Oncol 2021. [DOI: 10.1002/hon.190_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - M. Hamon
- Hopital André Mignot Pathology Versailles France
| | | | - J. Adélaï
- IPC, Predictive Oncology/ CRCM Inserm CNRS AMU Marseille France
| | - A. Guille
- CRCM Predictive oncology Marseille France
| | - M. Parrens
- Hopital haut‐Lévéque, Pathology Bordeaux France
| | | | - A. Bardet
- Institut Paoli‐Calmettes pathology Marseille France
| | - L. Mescam
- Institut Paoli‐Calmettes pathology Marseille France
| | | | - P. Sujobert
- CHU Lyon‐Sud, Hématology Pierre‐Bénite France
| | - C. Besson
- Hopital André Mignot Pathology Versailles France
| | | | - L. Xerri
- Institut Paoli‐Calmettes pathology Marseille France
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7
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Bierne H, Hamon M. Targeting host epigenetic machinery: The Listeria paradigm. Cell Microbiol 2021; 22:e13169. [PMID: 32185898 DOI: 10.1111/cmi.13169] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/22/2020] [Accepted: 01/22/2020] [Indexed: 12/11/2022]
Abstract
By modifying the host cell transcription programme, pathogenic bacteria disrupt a wide range of cellular processes and take control of the host's immune system. Conversely, by mobilising a network of defence genes, the host cells trigger various responses that allow them to tolerate or eliminate invaders. The study of the molecular basis of this crosstalk is crucial to the understanding of infectious diseases. Although research has long focused on the targeting of eukaryotic DNA-binding transcription factors, more recently, another powerful way by which bacteria modify the expression of host genes has emerged: chromatin modifications in the cell nucleus. One of the most prolific bacterial models in this area has been Listeria monocytogenes, a facultative intracellular bacterium responsible for serious food-borne infections. Here, we aim to highlight the contribution of this model to the field of bacteria-mediated chromatin modifications. We will first recall the general principles of epigenetic regulation and then illustrate five mechanisms that mobilise the epigenetic machinery in response to Listeria factors, either through bacterial molecular patterns, a toxin, an invasion protein, or nucleomodulins. Strategies used by Listeria to control the expression of host genes at the chromatin level, by activation of cytosolic signalling pathways or direct targeting of epifactors in the nucleus, have contributed to the emergence of a new discipline combining cellular microbiology and epigenetics: "patho-epigenetics."
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Affiliation(s)
- Hélène Bierne
- Université Paris Saclay, INRAE, AgroParisTech, Micalis Institute, Epigenetics and Cellular Microbiology Team, Jouy-en-Josas, France
| | - Mélanie Hamon
- G5 Chromatin and Infection, Institut Pasteur, Paris, France
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8
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Charvet E, Kramkimel N, Chaplain L, Gantzer A, Kassem O, Longvert C, Blom A, Dupin N, Aractingi S, Hamon M, Zimmermann U, Emile JF, Sohier P, Sidibé T, Saiag P, Funck-Brentano E. Second primary cutaneous melanoma in patients with advanced melanoma treated with anti-programmed-death-receptor-1 monoclonal antibodies. Br J Dermatol 2020; 184:746-748. [PMID: 33098566 DOI: 10.1111/bjd.19629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 01/10/2023]
Affiliation(s)
- E Charvet
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - N Kramkimel
- Departments of, Department of, Dermatology, Cochin Hospital, AP-HP, Paris, France
| | - L Chaplain
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France.,EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France
| | - A Gantzer
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - O Kassem
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - C Longvert
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France.,EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France
| | - A Blom
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France.,EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France
| | - N Dupin
- Departments of, Department of, Dermatology, Cochin Hospital, AP-HP, Paris, France
| | - S Aractingi
- Departments of, Department of, Dermatology, Cochin Hospital, AP-HP, Paris, France
| | - M Hamon
- Department of, Pathology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - U Zimmermann
- Department of, Pathology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - J-F Emile
- EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France.,Department of, Pathology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - P Sohier
- Department of, Pathology, Cochin Hospital, AP-HP, Paris, France
| | - T Sidibé
- Department of, Pharmacy, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France
| | - P Saiag
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France.,EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France
| | - E Funck-Brentano
- Departments of, Department of, General and Oncologic Dermatology, Ambroise-Paré Hospital, AP-HP, Boulogne-Billancourt, France.,EA 4340 'Biomarkers and Clinical Trials in Cancerology and Hemato-oncology', UVSQ, Université Paris-Saclay, Boulogne-Billancourt, France
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9
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Rougier E, Hamon M, Boeri C, Jehl F, Jenny JY, Klein S, Niglis L, Riegel P, Gaudias J, Ronde-Oustau C. Prise en charge des infections chroniques de prothèses totales de hanche (PTH) et de genou (PTG) traitées par changement en un temps : quand faut-il élargir l’antibiothérapie probabiliste aux bacilles à gram négatif (BGN) ? (Étude β-SEPTIC). Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Ribet D, Hamon M, Gouin E, Nahori MA, Impens F, Neyret-Kahn H, Gevaert K, Vandekerckhove J, Dejean A, Cossart P. Author Correction: Listeria monocytogenes impairs SUMOylation for efficient infection. Nature 2020; 580:E20. [PMID: 32350466 DOI: 10.1038/s41586-020-2154-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Affiliation(s)
- David Ribet
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité des Interactions Bactéries-Cellules, F-75015, Paris, France.,INSERM, U604, F-75015, Paris, France.,INRA, USC2020, F-75015, Paris, France
| | - Mélanie Hamon
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité des Interactions Bactéries-Cellules, F-75015, Paris, France.,INSERM, U604, F-75015, Paris, France.,INRA, USC2020, F-75015, Paris, France
| | - Edith Gouin
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité des Interactions Bactéries-Cellules, F-75015, Paris, France.,INSERM, U604, F-75015, Paris, France.,INRA, USC2020, F-75015, Paris, France
| | - Marie-Anne Nahori
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité des Interactions Bactéries-Cellules, F-75015, Paris, France.,INSERM, U604, F-75015, Paris, France.,INRA, USC2020, F-75015, Paris, France
| | - Francis Impens
- Department of Medical Protein Research, VIB, B-9000, Ghent, Belgium.,Department of Biochemistry, Ghent University, B-9000, Ghent, Belgium
| | - Hélène Neyret-Kahn
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité Organisation Nucléaire et Oncogenèse, F-75015, Paris, France.,INSERM, U579, F-75015, Paris, France
| | - Kris Gevaert
- Department of Medical Protein Research, VIB, B-9000, Ghent, Belgium.,Department of Biochemistry, Ghent University, B-9000, Ghent, Belgium
| | - Joël Vandekerckhove
- Department of Medical Protein Research, VIB, B-9000, Ghent, Belgium.,Department of Biochemistry, Ghent University, B-9000, Ghent, Belgium
| | - Anne Dejean
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité Organisation Nucléaire et Oncogenèse, F-75015, Paris, France.,INSERM, U579, F-75015, Paris, France
| | - Pascale Cossart
- Département de Biologie Cellulaire et Infection, Institut Pasteur, Unité des Interactions Bactéries-Cellules, F-75015, Paris, France. .,INSERM, U604, F-75015, Paris, France. .,INRA, USC2020, F-75015, Paris, France.
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Abstract
Contrairement aux autres produits addictogènes qui agissent via des cibles spécifiques (récepteurs opiacés pour l’héroïne, récepteur cannabinoïde CB1 pour le cannabis, récepteurs nicotiniques pour le tabac, transporteurs des monoamines pour la cocaïne), l’alcool ne se fixe pas sur une cible en particulier, mais intervient à de multiples niveaux, enzymatiques, réceptoriels, etc., dans le cerveau. Certes, comme celle des autres produits addictogènes, la prise d’alcool entraîne une activation du système de récompense (reward system), et donc la libération de dopamine au niveau des projections de la voie méso-cortico-limbique, mais elle provoque aussi une facilitation de la neurotransmission GABAergique inhibitrice et, au contraire, une diminution de la neurotransmisision glutamatergique excitatrice, via des modulations allostériques des récepteurs impliqués (GABA A d’une part, NMDA d’autre part). La répétition de ces actions du fait de la prise répétée d’éthanol déclenche des processus adaptatifs de telle sorte que l’efficacité de la neurotransmission GABAergique diminue progressivement au profit d’une facilitation de la neurotransmission glutamatergique, conduisant à une hyperexcitabilité neuronale, caractéristique de l’alcoolo-dépendance. Si le dysfonctionnement cérébral qui en résulte est bien en cause dans le syndrôme de manque, dès lors son inversion par des agents facilitateurs du GABA ou inhibiteurs du glutamate pourrait ouvrir la voie à des traitements réellement efficaces de l’alcoolo-dépendance. De fait, le baclofène et le gamma-hydroxy-butyrate, en activant directement les récepteurs GABA B, voire des modulateurs allostériques positifs de ces récepteurs, ont d’ores et déjà fait la preuve de leur capacité à réduire l’alcoolo-dépendance [1]. Par ailleurs, des antagonistes des récepteurs NMDA et des modulateurs inhibiteurs de la neurotransmission glutamatergique (dont l’acamprosate) sont également efficaces [2]. Enfin, d’autres composés qui conduisent aussi à une diminution de l’hyperexcitabilité neuronale, mais en bloquant des canaux calciques voltage-dépendants comme la gabapentine et la prégabaline, pourraient renouveler l’arsenal pharmacologique du traitement de l’alcoolo-dépendance [3].
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Abstract
Abstract
A simple, reproducible, and precise potentiometric assay (copper indicator electrode) has been developed for alkalinized solutions of pure casein hydrolysates, with or without additional amino acids, carbohydrates, or lipids (short chain tryglicerides; SCT) using a titrated copper (II) sulfate solution. The copper consumption is related to both free amino acid and peptide contents. Thus, in comparison with the (α-amino nitrogen determination, the method described here gives better information about the composition of protein hydrolysates.
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Affiliation(s)
- M P C Silvestre
- Faculdade de Farmacia da UFMG, Departamento de Alimentos, Av. Olegario Maciel, 2360-30 180 Belo Horizonte, Brasil
| | - E Lati
- Faculté de Pharmacie, Laboratoire de Chimie Analytique, 5 rue Jean Baptiste Clement, 92290 Chatenay-Malabry, France
| | - C Dauphin
- Faculté de Pharmacie, Laboratoire de Chimie Analytique, 5 rue Jean Baptiste Clement, 92290 Chatenay-Malabry, France
| | - M Hamon
- Faculté de Pharmacie, Laboratoire de Chimie Analytique, 5 rue Jean Baptiste Clement, 92290 Chatenay-Malabry, France
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Charvet E, Chaplain L, Gantzer A, Kassem O, Longvert C, Blom A, Hamon M, Zimmermann U, Emile JF, Saiag P, Funck-Brentano E. Deuxième mélanome primitif sous anti-PD-1 : à propos de 2 cas. Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hamon M, Dequeant B, Decambron A, Reyes-Gomez E, Manassero M. Leiomyoma in the nasal cavity of a dog. J Small Anim Pract 2018; 60:319-322. [PMID: 29355971 DOI: 10.1111/jsap.12822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 01/23/2017] [Accepted: 05/16/2017] [Indexed: 01/10/2023]
Abstract
A 7-year-old, 34-kg, neutered male Labrador retriever was presented with a 1-year history of intermittent sneezing with occasional left-sided epistaxis. CT revealed a mass in the left nasal cavity. Histopathological analysis of rhinoscopy-guided tissue biopsies was consistent with chronic necrotic and ulcerative rhinitis. Surgical debridement by ventral rhinotomy was subsequently performed and histopathological diagnosis was leiomyoma. Complete resolution of the nasal discharge and reduced sneezing frequency were observed after surgery. Fourteen months postoperatively, CT detected no regrowth of the mass.
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Affiliation(s)
- M Hamon
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - B Dequeant
- Department of Pathology, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - A Decambron
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - E Reyes-Gomez
- Department of Pathology, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - M Manassero
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
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Gautier A, Geny D, Bourgoin S, Bernard J, Hamon M. Differential innervation of superficial versus deep laminae of the dorsal horn by bulbo-spinal serotonergic pathways in the rat. IBRO Rep 2017; 2:72-80. [PMID: 30135935 PMCID: PMC6084826 DOI: 10.1016/j.ibror.2017.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 03/28/2017] [Accepted: 04/07/2017] [Indexed: 01/04/2023] Open
Abstract
Convergent data showed that bulbo-spinal serotonergic projections exert complex modulatory influences on nociceptive signaling within the dorsal horn. These neurons are located in the B3 area which comprises the median raphe magnus (RMg) and the lateral paragigantocellular reticular (LPGi) nuclei. Because LPGi 5-HT neurons differ from RMg 5-HT neurons regarding both their respective electrophysiological properties and responses to noxious stimuli, we used anatomical approaches for further characterization of the respective spinal projections of LPGi versus RMg 5-HT neuron subgroups. Adult Sprague-Dawley rats were stereotaxically injected into the RMg or the LPGi with the anterograde tracer Phaseolus vulgaris leucoagglutinin (PHA-L). The precise location of injection sites and RMg vs LPGi spinal projections into the different dorsal horn laminae were visualized by PHA-L immunolabeling. Double immunofluorescent labeling of PHA-L and the serotonin transporter (5-HTT) allowed detection of serotonergic fibers among bulbo-spinal projections. Anterograde tracing showed that RMg neurons project preferentially into the deep laminae V-VI whereas LPGi neuron projections are confined to the superficial laminae I-II of the ipsilateral dorsal horn. All along the spinal cord, double-labeled PHA-L/5-HTT immunoreactive fibers, which represent only 5-15% of all PHA-L-immunoreactive projections, exhibit the same differential locations depending on their origin in the RMg versus the LPGi. The clear-cut distinction between dorsal horn laminae receiving bulbo-spinal serotonergic projections from the RMg versus the LPGi provides further anatomical support to the idea that the descending serotonergic pathways issued from these two bulbar nuclei might exert different modulatory influences on the spinal relay of pain signaling neuronal pathways.
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Affiliation(s)
| | | | | | | | - M. Hamon
- INSERM UMR 894 - Centre de Psychiatrie et Neurosciences, Université Paris Descartes, 75014, Paris, France
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Lê-Leplat C, Hamon M, Wallet D, Bourgoin F, Buronfosse A. Parcours de soins hospitaliers : place de l’hospitalisation à domicile (HAD) dans la filière de prise en charge. Rev Epidemiol Sante Publique 2017. [DOI: 10.1016/j.respe.2017.01.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abstract
Selon l’International Association for the Study of Pain (IASP), la douleur est « une expérience sensorielle et émotionnelle désagréable, associée à une lésion tissulaire réelle ou potentielle, ou décrite en ces termes ». D’après cette définition, la douleur correspond à la fois à un phénomène perceptif et à un vécu subjectif, et une intrication étroite existe entre ces composantes. De fait, les voies nerveuses qui conduisent les messages nociceptifs se projettent non seulement sur des structures cérébrales qui intègrent les paramètres physicochimiques de la sensation douloureuse (thalamus, cortex somesthésique) mais aussi sur celles qui en évaluent l’impact émotionnel aversif et déclenchent des réponses neurovégétatives, cognitives et comportementales adaptées ou non (aire parabrachiale latérale, noyau central de l’amygdale, hypothalamus, insula) . Cette organisation anatomique est en rapport avec les données cliniques qui attestent d’une forte co-morbidité entre les douleurs chroniques et des désordres affectifs tout particulièrement . Alors que les douleurs aiguës (nociceptives) et les douleurs chroniques inflammatoires mettent en jeu des mécanismes neurobiologiques bien connus aujourd’hui, les douleurs chroniques neuropathiques, ou de type neuropathique (par ex. : fibromyalgie), sont toujours l’objet d’intenses investigations . Leur prévalence est élevée (7 % de la population générale), et les traitements disponibles n’ont qu’une efficacité et une tolérabilité limitées. Certains antidépresseurs sont prescrits en première intention, mais leur NNT (« number needed to treat ») reste élevé (NTT = 4–6), même pour une réduction effective de la sensation douloureuse de seulement 30 %. En réalité, la prescription d’antidépresseurs ne résulte que d’observations empiriques, et le développement de traitements véritablement adaptés et efficaces ne pourra se faire qu’au prix d’une connaissance approfondie des mécanismes neurobiologiques en cause. À cet égard, les études actuelles qui portent sur l’impact des interactions neurone-glie , de modifications épigénétiques induites au cours de la prime enfance et/ou l’adolescence, et/ou d’altérations affectant le microbiote semblent très prometteuses.
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Beuzelin N, Tiberghien C, Godignon M, Faguais E, Boisgontier F, Leroy F, Ho Van Truc P, Hamon M, Desvergee A, Fourreau M, Jokic C. Post stroke therapeutic education program: The experience of three aftercare and rehabilitation structures specialized in neurology in Lower Normandy. Ann Phys Rehabil Med 2015. [DOI: 10.1016/j.rehab.2015.07.248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lemesle G, Schurtz G, Bauters C, Hamon M. High on-treatment platelet reactivity with ticagrelor versus prasugrel: a systematic review and meta-analysis. J Thromb Haemost 2015; 13:931-42. [PMID: 25809392 DOI: 10.1111/jth.12907] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 03/16/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Ticagrelor and prasugrel have shown superiority over clopidogrel. However, it remains unclear if one is superior to another regarding on-treatment platelet reactivity. OBJECTIVES To compare the impact of ticagrelor and prasugrel on high on-treatment platelet reactivity (HTPR). METHODS The PubMed and Cochrane databases were searched for eligible studies in December 2014. Studies were eligible if they compared ticagrelor and prasugrel regarding high on-treatment platelet reactivity (HTPR). Pooled estimates were calculated by using a random-effects model with 95% confidence intervals. RESULTS We included 14 studies and 1822 patients: 805 and 1017 in the ticagrelor and prasugrel groups, respectively. The rate of HTPR was significantly lower in the ticagrelor group: 1.5% vs. 9.8% (RR = 0.27 [0.14-0.50]). The pre-specified analysis focusing on randomized trials (n = 10) showed consistent results (RR = 0.27 [0.12-0.60]). CONCLUSION Our results suggest that ticagrelor allows a higher platelet reactivity inhibition as compared with prasugrel and leads to a further decrease in the rate of HTPR.
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Affiliation(s)
- G Lemesle
- Centre Hospitalier Régional et Universitaire de Lille, Lille, France
- Inserm U744, Institut Pasteur de Lille, Lille, France
- Faculté de Médecine de l'Université de Lille, Lille, France
| | - G Schurtz
- Centre Hospitalier Régional et Universitaire de Lille, Lille, France
| | - C Bauters
- Centre Hospitalier Régional et Universitaire de Lille, Lille, France
- Inserm U744, Institut Pasteur de Lille, Lille, France
- Faculté de Médecine de l'Université de Lille, Lille, France
| | - M Hamon
- Centre Hospitalier Universitaire de Caen, Caen, France
- Faculté de Médecine de Caen, Caen, France
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Hamon M, Nelson DL, Herbet A, Bockaert J, Glowinski J. Characteristics of serotonin receptors in the rat brain. Monogr Neural Sci 2015; 7:161-75. [PMID: 7231436 DOI: 10.1159/000388823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Two biochemical methods are currently available for studying 5-HT receptors in the central nervous system. The first consists of measuring the specific high affinity binding of 3H-5-HT to synaptic membranes. The other derives from the discovery of an adenylate cyclase which can be activated by 5-HT in brain homogenates. Whereas the specific 3H-5-HT binding is measurable in young as well as in adult rats, the 5-HT-sensitive adenylate cyclase can be quantitatively estimated only during the first three weeks following birth. Later on, the increment of adenylate cyclase activity produced by 5-HT is too low to permit valid measurements, notably in tissues from adult rats. Studies on the effects of various agonists and antagonists demonstrated that the specific binding site characterized by a high affinity for 3H-5-HT (Kd = 1.5 nM) exhibited the expected properties of a 5-HT receptor in brain. Performing chemical lesions on serotoninergic neurons by an intracerebral injection of 5, 7-dihydroxytryptamine or the blockade of central 5-HT receptors by the peripheral administration of methiothepin resulted in a subsequent increase in the number of specific binding sites for 3H-5-HT particularly in the hippocampus (+30 to +45%). In contrast, preliminary attempts to detect any supersensitivity of the 5-HT-sensitive adenylate cyclase after selective raphe lesions were unsuccessful. Indeed, several observations strongly suggested that the high affinity binding site for 3H-5-HT did not correspond to the 5-HT receptor coupled to adenylate cyclase in synaptic membranes: 1) the apparent affinity of the 5-HT-sensitive adenylate cyclase for 5-HT was about 300 times lower (Kd = 0.5 microM) than that of the specific 3H-5-HT binding site; 2)the ontogenic evolutions of 3H-5-HT binding and 5-HT-sensitive adenylate cyclase were not parallel, notably in the hippocampus; 3) they were differently affected by several drugs. For instance, quipazine, a putative 5-HT agonist, effectively displaced 3H-5-HT from its specific binding site (Ki = 0.23 microM) whereas it did not affect 5-HT-sensitive adenylate cyclase. In conclusion, it is likely that the high affinity binding site for 3H-5-HT and the 5-HT-sensitive adenylate cyclase belong to two different postsynaptic 5-HT receptors in the rat brain.
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Abid S, Boiron E, Tissot C, Houssaini A, Czibik G, Sawaki D, Marcos E, Wan F, Dubois-Randé J, Hamon M, Derumeaux G, Adnot S. The role of 5-HT2B receptors in development of valvulopathy, cardiomyopathy, and pulmonary hypertension in Fawn-Hooded rats. Rev Mal Respir 2015. [DOI: 10.1016/j.rmr.2015.02.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Michot B, Kayser V, Hamon M, Bourgoin S. CGRP receptor blockade by MK-8825 alleviates allodynia in infraorbital nerve-ligated rats. Eur J Pain 2014; 19:281-90. [PMID: 25370954 DOI: 10.1002/ejp.616] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND Previous data showed that, in rats, anti-migraine drugs (triptans, olcegepant) significantly reduced mechanical allodynia induced by infraorbital nerve (ION) ligation but not that evoked by sciatic nerve (SN) ligation. Whether this also occurs with MK-8825, a novel anti-migraine drug also acting through CGRP receptor blockade (but chemically unrelated to olcegepant) was tested in the present study, which also investigated possible anti-neuroinflammatory effects of this drug. METHODS Adult male Sprague-Dawley rats underwent unilateral chronic constriction injury (CCI) to either the ION or the SN, and mechanical allodynia was assessed 2 weeks later within the ipsilateral vibrissae territory or hindpaw, respectively. Transcripts of neuroinflammatory markers were quantified by real-time quantitative RT-PCR in ipsilateral trigeminal ganglion and spinal trigeminal nucleus in CCI-ION rats. RESULTS Acute as well as repeated (for 4 days) administration of MK-8825 (30-100 mg/kg, i.p.) significantly reduced CCI-ION-induced mechanical allodynia but was ineffective in CCI-SN rats. CCI-ION was associated with marked up-regulation of neuronal and glial inflammatory markers (ATF3, IL6, iNOS, COX2) in ipsilateral trigeminal ganglion but not spinal trigeminal nucleus. MK-8825-induced inhibition of iNOS mRNA up-regulation probably underlay its anti-allodynic effect because pharmacological blockade of iNOS by AMT (6 mg/kg, s.c.) mimicked this effect. CONCLUSIONS These data further support the idea that CGRP receptor blockade might be a valuable approach to alleviate trigeminal, but not spinal, neuropathic pain through, at least partly, an inhibitory effect on neuropathic pain-associated increase in NO production in trigeminal ganglion.
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Affiliation(s)
- B Michot
- INSERM U894, CPN, Paris, France; Neuropsychopharmacology, Faculty of Medicine Pierre & Marie Curie, University Pierre et Marie Curie (UPMC), Paris, France
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Alexander SPH, Benson HE, Faccenda E, Pawson AJ, Sharman JL, McGrath JC, Catterall WA, Spedding M, Peters JA, Harmar AJ, Abul-Hasn N, Anderson CM, Anderson CMH, Araiksinen MS, Arita M, Arthofer E, Barker EL, Barratt C, Barnes NM, Bathgate R, Beart PM, Belelli D, Bennett AJ, Birdsall NJM, Boison D, Bonner TI, Brailsford L, Bröer S, Brown P, Calo G, Carter WG, Catterall WA, Chan SLF, Chao MV, Chiang N, Christopoulos A, Chun JJ, Cidlowski J, Clapham DE, Cockcroft S, Connor MA, Cox HM, Cuthbert A, Dautzenberg FM, Davenport AP, Dawson PA, Dent G, Dijksterhuis JP, Dollery CT, Dolphin AC, Donowitz M, Dubocovich ML, Eiden L, Eidne K, Evans BA, Fabbro D, Fahlke C, Farndale R, Fitzgerald GA, Fong TM, Fowler CJ, Fry JR, Funk CD, Futerman AH, Ganapathy V, Gaisnier B, Gershengorn MA, Goldin A, Goldman ID, Gundlach AL, Hagenbuch B, Hales TG, Hammond JR, Hamon M, Hancox JC, Hauger RL, Hay DL, Hobbs AJ, Hollenberg MD, Holliday ND, Hoyer D, Hynes NA, Inui KI, Ishii S, Jacobson KA, Jarvis GE, Jarvis MF, Jensen R, Jones CE, Jones RL, Kaibuchi K, Kanai Y, Kennedy C, Kerr ID, Khan AA, Klienz MJ, Kukkonen JP, Lapoint JY, Leurs R, Lingueglia E, Lippiat J, Lolait SJ, Lummis SCR, Lynch JW, MacEwan D, Maguire JJ, Marshall IL, May JM, McArdle CA, McGrath JC, Michel MC, Millar NS, Miller LJ, Mitolo V, Monk PN, Moore PK, Moorhouse AJ, Mouillac B, Murphy PM, Neubig RR, Neumaier J, Niesler B, Obaidat A, Offermanns S, Ohlstein E, Panaro MA, Parsons S, Pwrtwee RG, Petersen J, Pin JP, Poyner DR, Prigent S, Prossnitz ER, Pyne NJ, Pyne S, Quigley JG, Ramachandran R, Richelson EL, Roberts RE, Roskoski R, Ross RA, Roth M, Rudnick G, Ryan RM, Said SI, Schild L, Sanger GJ, Scholich K, Schousboe A, Schulte G, Schulz S, Serhan CN, Sexton PM, Sibley DR, Siegel JM, Singh G, Sitsapesan R, Smart TG, Smith DM, Soga T, Stahl A, Stewart G, Stoddart LA, Summers RJ, Thorens B, Thwaites DT, Toll L, Traynor JR, Usdin TB, Vandenberg RJ, Villalon C, Vore M, Waldman SA, Ward DT, Willars GB, Wonnacott SJ, Wright E, Ye RD, Yonezawa A, Zimmermann M. The Concise Guide to PHARMACOLOGY 2013/14: overview. Br J Pharmacol 2014; 170:1449-58. [PMID: 24528237 DOI: 10.1111/bph.12444] [Citation(s) in RCA: 146] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The Concise Guide to PHARMACOLOGY 2013/14 provides concise overviews of the key properties of over 2000 human drug targets with their pharmacology, plus links to an open access knowledgebase of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties from the IUPHAR database. The full contents can be found at http://onlinelibrary.wiley.com/doi/10.1111/bph.12444/full. This compilation of the major pharmacological targets is divided into seven areas of focus: G protein-coupled receptors, ligand-gated ion channels, ion channels, catalytic receptors, nuclear hormone receptors, transporters and enzymes. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. A new landscape format has easy to use tables comparing related targets. It is a condensed version of material contemporary to late 2013, which is presented in greater detail and constantly updated on the website www.guidetopharmacology.org, superseding data presented in previous Guides to Receptors & Channels. It is produced in conjunction with NC-IUPHAR and provides the official IUPHAR classification and nomenclature for human drug targets, where appropriate. It consolidates information previously curated and displayed separately in IUPHAR-DB and GRAC and provides a permanent, citable, point-in-time record that will survive database updates.
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Affiliation(s)
- Stephen P H Alexander
- School of Life Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
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Limbruno U, Picchi A, Galli S, Huber K, Lipiecki J, Bernstein D, Deliargyris E, Anthopoulos P, Nienaber C, Hamon M. Bivalirudin use in patients undergoing percutaneous coronary intervention for acute myocardial infarction. Insights from the prospective, multi-centre EUROVISION registry. Acute Card Care 2014; 16:127-31. [PMID: 25101656 DOI: 10.3109/17482941.2014.944542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND The effectiveness of bivalirudin in patients undergoing percutaneous coronary intervention for acute myocardial infarction has been tested in clinical trials, but its use in a real-world scenario has never been reported. METHODS From the total number of patients enrolled in the EUROVISION registry, 678 subjects affected by ST-elevation myocardial infarction were selected and included in the analysis. Posology and usage patterns of bivalirudin, as evaluated by dose and time of drug bolus and infusion administered, were evaluated. The 30-day outcome has been assessed by efficacy and safety endpoints. RESULTS All patients received an initial intravenous bolus of bivalirudin (0.70±0.25 mg/kg) followed by an infusion (1.58±0.47 mg/kg/h; duration: 60 [30, 107] min) in 99.3% of cases. An additional bolus (0.49±0.06 mg/kg) was administered in 9.3% of patients. Bivalirudin infusion was prolonged after procedure in 62.2%. Death occurred in 2.1% of patients, non-fatal myocardial reinfarction in 0.3%, unplanned revascularization in 0.6% and non-fatal stroke in 0.4%. Acute stent thrombosis was not observed. Major bleeding occurred in 1.5% of patients. CONCLUSIONS Bivalirudin usage in the setting of primary PCI provided excellent results in terms of 30-day outcome even in a real-world population.
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Affiliation(s)
- U Limbruno
- Misericordia Hospital , ASL 9 Grosseto , Italy
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Steg PG, Lopez-de-Sà E, Schiele F, Hamon M, Meinertz T, Goicolea J, Werdan K, Lopez-Sendon JL. Safety of intravenous ivabradine in acute ST-segment elevation myocardial infarction patients treated with primary percutaneous coronary intervention: a randomized, placebo-controlled, double-blind, pilot study. Eur Heart J Acute Cardiovasc Care 2014; 2:270-9. [PMID: 24222839 DOI: 10.1177/2048872613489305] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 11/16/2022]
Abstract
AIMS Rapid heart rate lowering may be attractive in acute ST-segment elevation myocardial infarction (STEMI). Accordingly we studied the effect of intravenous ivabradine on heart rate in this setting. METHODS AND RESULTS This was a multicenter randomized double-blind placebo-controlled trial: patients aged 40-80 years were randomized after successful primary percutaneous coronary intervention (PCI) performed within 6 h of STEMI symptom onset. Patients were in sinus rhythm and with heart rate >80 bpm and systolic blood pressure >90 mm Hg. They were randomly assigned (2:1 ratio) to intravenous ivabradine (n=82) (5 mg bolus over 30 s, followed by 5 mg infusion over 8 h) or matching placebo (n=42). The primary outcome measure was heart rate and blood pressure. In both groups, heart rate was reduced over 8 h, with a faster and more marked decrease on ivabradine than placebo (22.2 ± 1.3 vs 8.9 ± 1.8 bpm, p<0.0001). After treatment discontinuation, heart rate was similar in both groups. Throughout the study, there was no difference in blood pressure between groups. There was no difference in cardiac biomarkers (creatine kinase (CK-MB), troponin T and troponin I). On echocardiography performed at baseline and post treatment (median 1.16 days), final left ventricular volumes were lower in the ivabradine group both for left ventricular end-diastolic volume (LVEDV) (87.1 ± 28.2 vs 117.8 ± 21.4 ml, p=0.01) and left ventricular end-systolic volume (LVESV) (42.5 ± 19.0 versus 59.1 ± 11.3 ml, p=0.03) without differences in volume change or left ventricular ejection fraction. CONCLUSION This pilot study shows that intravenous ivabradine may be used safely to slow the heart rate in STEMI. Further studies are needed to characterize its effect on infarct size, left ventricular function and clinical outcomes in this population.
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Affiliation(s)
- P G Steg
- Hôpital Bichat, Assistance Publique-Hôpitaux de Paris, France ; INSERM U-698, Paris, France
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Hamon M, Dickinson N, Devineau A, Bolien D, Tranchant MJ, Taillier C, Jabin I, Harrowven DC, Whitby RJ, Ganesan A, Dalla V. Intra- and Intermolecular Alkylation of N,O-Acetals and π-Activated Alcohols Catalyzed by in Situ Generated Acid. J Org Chem 2014; 79:1900-12. [PMID: 24533649 DOI: 10.1021/jo4015886] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mélanie Hamon
- Unité de Recherche en Chimie
Organique
et Macromoléculaire, Faculté des Sciences et Techniques de l’Université du Havre, EA 3221, FR CNRS 3038, 25 rue Philippe
Lebon, BP 540, 76058 Le Havre cedex, France
| | - Niall Dickinson
- School of Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Alice Devineau
- Unité de Recherche en Chimie
Organique
et Macromoléculaire, Faculté des Sciences et Techniques de l’Université du Havre, EA 3221, FR CNRS 3038, 25 rue Philippe
Lebon, BP 540, 76058 Le Havre cedex, France
| | - David Bolien
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Marie-José Tranchant
- Unité de Recherche en Chimie
Organique
et Macromoléculaire, Faculté des Sciences et Techniques de l’Université du Havre, EA 3221, FR CNRS 3038, 25 rue Philippe
Lebon, BP 540, 76058 Le Havre cedex, France
| | - Catherine Taillier
- Unité de Recherche en Chimie
Organique
et Macromoléculaire, Faculté des Sciences et Techniques de l’Université du Havre, EA 3221, FR CNRS 3038, 25 rue Philippe
Lebon, BP 540, 76058 Le Havre cedex, France
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université Libre de Bruxelles (ULB), Av. F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - David C. Harrowven
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - Richard J. Whitby
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom
| | - A. Ganesan
- School of Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Vincent Dalla
- Unité de Recherche en Chimie
Organique
et Macromoléculaire, Faculté des Sciences et Techniques de l’Université du Havre, EA 3221, FR CNRS 3038, 25 rue Philippe
Lebon, BP 540, 76058 Le Havre cedex, France
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Hamon M, Mehta S. FONDAPARINUX REDUCED MAJOR BLEEDING VERSUS ENOXAPARIN IN PATIENTS WITH ACUTE CORONARY SYNDROME UNDERGOING EARLY INVASIVE MANAGEMENT EVEN IN THE CONTEXT OF TRANS-RADIAL CORONARY INTERVENTION: INSIGHTS FROM OASIS-5. J Thromb Haemost 2014. [DOI: 10.1111/j.1538-7836.2007.tb01601.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Beuzelin N, Jokic C, Ho Van Truc P, Hamon M, Desvergée A, Faguais E, Godignon M, Thiberghien C, Fourreau M, Boisgontier F, Leroy F. Organisation d’un programme multicentrique d’éducation thérapeutique du patient (ETP) victime d’un AVC. Ann Phys Rehabil Med 2013. [DOI: 10.1016/j.rehab.2013.07.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Razvodovsky Y, Borodinsky A, Pascual-Mora M, Pla A, Renau-Piqueras J, Guerri C, Haass-Koffler C, Kenna G, Henry A, Bartlett S, Dudek M, Abo-Ramadan U, Hyytia P, Maccioni P, Gessa GL, Thomas A, Malherbe P, Mugnaini C, Corelli F, Colombo G, Maccioni P, Vargiolu D, Loi B, Lobina C, Zaru A, Carai M, Gessa GL, Colombo G, Maccioni P, Vargiolu D, Carai M, Gessa GL, Riva A, Bombardelli E, Morazzoni P, Colombo G, Osna N, Kharbanda K, McVicker B, Casey C, Mercer D, Naassila M, Legastelois R, Alaux-Cantin S, Houchi H, Botia B, Pronko PS, Khomich TI, Satanovskaya VI, Karaedova LM, Borodinsky AN, Lis RE, Feltmann K, Steensland P, Ledesma JC, Bali P, Bali P, Ledesma JC, Gonzalez C, Bali P, Ledesma JC, Aragon C, Etelalahti T, Eriksson P, Todkar A, Granholm L, Comasco E, Oreland L, Hodgins S, Nilsson K, Nylander I, Phedina K, Zimatkin S, Smutek M, Parkitna JR, Przewlocki R, Janeczek P, Van Steenwyk G, Lewohl J, Napper R, Hopping M, Stragier E, Massart R, Hamon M, Lanfumey L. BASIC RESEARCH. Alcohol Alcohol 2013. [DOI: 10.1093/alcalc/agt113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Martin CBP, Ramond F, Farrington DT, Aguiar AS, Chevarin C, Berthiau AS, Caussanel S, Lanfumey L, Herrick-Davis K, Hamon M, Madjar JJ, Mongeau R. RNA splicing and editing modulation of 5-HT(2C) receptor function: relevance to anxiety and aggression in VGV mice. Mol Psychiatry 2013; 18:656-65. [PMID: 23247076 DOI: 10.1038/mp.2012.171] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Changes in serotonin(2C) receptor (5-HTR2c) editing, splicing and density were found in conditions such as depression and suicide, but mechanisms explaining the changes in 5-HTR2c function are unknown. Thus, mice expressing only the fully edited VGV isoform of 5-HTR2c, in which clinically relevant behavioral changes are associated with alterations in splicing and receptor density, were studied. VGV mice displayed enhanced anxiety-like behavior in response to a preferential 5-HTR2c agonist in the social interaction test. Nearly half of interactions between pairs of VGV congeners consisted of fighting behaviors, whereas no fighting occurred in wild-type (WT) mice. VGV mice also exhibited a striking increase in freezing behaviors in reaction to an innately aversive ultrasonic stimulus. This behavioral phenotype occurred in conjunction with decreased brain 5-HT turnover during stress. These functional data were put in relation with the 5-HTR2c mRNA splicing process generating a truncated protein (5-HTR2c-Tr) in addition to the full-length receptor (5-HTR2c-Fl). 5-HTR2c-Tr mRNA was less abundant in many brain regions of VGV mice, which concomitantly had more 5-HTR2c than WT mice. Fluorescence resonance energy transfer and bioluminescence resonance energy transfer studies in transfected living HEK293T cells showed that 5-HTR2c-Tr interacts with 5-HTR2c-Fl. The 5-HTR2c-Tr was localized in the endoplasmic reticulum where it retained 5-HTR2c-Fl, preventing the latter to reach the plasma membrane. Consequently, 5-HTR2c-Tr decreased (3)H-mesulergine binding to 5-HTR2c-Fl at the plasma membrane in a concentration-dependent manner and more strongly with edited 5-HTR2c-Fl. These results suggest that 5-HTR2c pre-mRNA editing and splicing are entwined processes determining increased 5-HTR2c levels in pathological conditions through a deficit in 5-HTR2c-Tr.
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Affiliation(s)
- C B P Martin
- INSERM U894, Centre de Psychiatrie et de Neuroscience, UPMC, Fac. Med. Pierre and Marie Curie, Site Pitié-Salpêtrière, Paris, France
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Nicolle A, de la Blanchardière A, Bonhomme J, Hamon M, Leclercq R, Hitier M. Aspergillus vertebral osteomyelitis in immunocompetent subjects: case report and review of the literature. Infection 2013; 41:833-40. [PMID: 23625788 DOI: 10.1007/s15010-013-0463-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 04/11/2013] [Indexed: 12/20/2022]
Abstract
Aspergillus spondylodiscitis (AS) is rare in immunocompetent (IC) patients. A 65-year-old diabetic IC male subject presented with cervical AS 18 months after otomycosis. Two serological tests, mastoidectomy and biopsy of the sphenoid bone, were negative. A prevertebral biopsy identified A. flavus. The patient was successfully treated with voriconazole. Forty-three cases of AS in IC patients have been published. A predisposition was found in 84 % of cases. Fever was reported in 20 % of cases, whereas neurological defects were present in 41 %. Serology was inconsistently positive (5/7) and diagnosis was confirmed by biopsy or surgery. A. fumigatus was the most frequently isolated species (74 %). All episodes were medically treated, associated with surgery in 57 % of cases, and 73 % of patients fully recovered. AS must be discussed in IC patients presenting with risk factors, including diabetes mellitus. Biopsy is necessary to confirm diagnosis, since serology offers low sensitivity. Nevertheless, the prognosis is good.
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Allilaire JF, Costentin J, Goullé JP, Hamon M, Laqueille X, Lejoyeux M, Mouren MC, Olié JP, Nordmann R, Tillement JP. [Controlled drug consumption rooms]. Bull Acad Natl Med 2013; 197:503-505. [PMID: 24919375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Michot B, Bourgoin S, Kayser V, Hamon M. Effects of tapentadol on mechanical hypersensitivity in rats with ligatures of the infraorbital nerve versus the sciatic nerve. Eur J Pain 2012; 17:867-80. [PMID: 23229959 DOI: 10.1002/j.1532-2149.2012.00259.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2012] [Indexed: 12/16/2022]
Abstract
BACKGROUND Convergent data showed that neuropathic pain has specific characteristics at cephalic versus extra-cephalic level, where single-targeted drugs differentially alleviate pain. Because the novel analgesic drug, tapentadol, is acting at two targets, μ-opioid receptors (as agonist) and noradrenaline reuptake (as inhibitor), we tested its effects on neuropathic pain at both cephalic and extra-cephalic levels. METHODS Sprague-Dawley rats underwent unilateral constriction injury (CCI) to the infraorbital nerve (ION; cephalic territory) or the sciatic nerve (SN; extra-cephalic territory), and alleviation of nerve lesion-induced mechanical allodynia/hyperalgesia was assessed after acute or repeated (for 4 days) treatment with tapentadol compared with morphine and/or reboxetine (noradrenaline reuptake inhibitor) 2 weeks after surgery. Possible changes in the expression of the neuroinflammatory markers activating transcription factor 3 (ATF3), interleukin-6 (IL-6) and brain-derived neurotrophic factor (BDNF) by repeated tapentadol treatment were quantified by real-time reverse transcription polymerase chain reaction in ganglia and central tissues. RESULTS Acute administration of tapentadol (1-10 mg/kg, i.p.) significantly reduced allodynia in both CCI-SN and CCI-ION rats. Although morphine (3 mg/kg, s.c.) or reboxetine (10 mg/kg, i.p.) alone was only marginally active, the combination of both drugs produced supra-additive effects like those observed with tapentadol. In contrast to repeated morphine whose effects vanished, the anti-allodynic effects of tapentadol remained unchanged after a 4-day treatment. However, the latter treatment with tapentadol did not affect nerve lesion-evoked overexpression of ATF3, IL-6 and BDNF transcripts. CONCLUSIONS The dual synergistic pharmacological properties of tapentadol, which result in clear-cut anti-neuropathic pain effects at both cephalic and extra-cephalic levels, probably involve mechanisms downstream of nerve injury-induced neuroinflammatory reaction.
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Affiliation(s)
- B Michot
- INSERM U894-CPN, Université Pierre et Marie Curie, Paris, France
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Abstract
Epigenetic mechanisms regulate expression of the genome to generate various cell types during development or orchestrate cellular responses to external stimuli. Recent studies highlight that bacteria can affect the chromatin structure and transcriptional program of host cells by influencing diverse epigenetic factors (i.e., histone modifications, DNA methylation, chromatin-associated complexes, noncoding RNAs, and RNA splicing factors). In this article, we first review the molecular bases of the epigenetic language and then describe the current state of research regarding how bacteria can alter epigenetic marks and machineries. Bacterial-induced epigenetic deregulations may affect host cell function either to promote host defense or to allow pathogen persistence. Thus, pathogenic bacteria can be considered as potential epimutagens able to reshape the epigenome. Their effects might generate specific, long-lasting imprints on host cells, leading to a memory of infection that influences immunity and might be at the origin of unexplained diseases.
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Affiliation(s)
- Hélène Bierne
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, Paris F-75015, France.
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Martin C, Chevarin C, Gassman M, Hamon M, Bettler B, Lanfumey L, Mongeau R. Contrôle GABAergique du tonus sérotoninergique central — rôle des récepteurs GABAB et implication possible dans l’action antidépressive de la kétamine. Encephale 2012. [DOI: 10.1016/j.encep.2012.06.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hamon M. Journées annuelles de l’AFPBN 2012. Encephale 2012. [DOI: 10.1016/j.encep.2012.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Brenchat A, Zamanillo D, Hamon M, Romero L, Vela JM. Role of peripheral versus spinal 5-HT(7) receptors in the modulation of pain undersensitizing conditions. Eur J Pain 2012; 16:72-81. [PMID: 21843960 DOI: 10.1016/j.ejpain.2011.07.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Several studies have suggested that 5-HT(7) receptors are involved in nociceptive processing but the exact contribution of peripheral versus central 5-HT(7) receptors still needs to be elucidated. In the present study, the respective roles of peripheral and spinal 5-HT(7) receptors in the modulation of mechanical hypersensitivity were investigated under two different experimental pain conditions. In a first set of experiments, the selective 5-HT(7) receptor agonist, E-57431, was systemically, intrathecally or peripherally (intraplantarly) administered to rats sensitized by intraplantar injection of capsaicin. Oral administration of E-57431 (1.25-10 mg/kg) was found to exert a clear-cut dose-dependent reduction of capsaicin-induced mechanical hypersensitivity. Interestingly, intrathecal administration of E-57431 (100 μg) also inhibited mechanical hypersensitivity secondary to capsaicin injection. In contrast, a dose-dependent enhancement of capsaicin-induced mechanical hypersensitivity was observed after local intraplantar injection of E-57431 (0.01-1 μg). In a second set of experiments, E-57431 was systemically or intrathecally administered to rats submitted to neuropathic pain (spared nerve injury model). Significant inhibition of nerve injury-induced mechanical hypersensitivity was found after intraperitoneal (10 mg/kg) as well as intrathecal (100 μg) administration of E-57431 in this chronic pain model. These studies provide evidence that, under sensitizing neurogenic/neuropathic conditions, activation of 5-HT(7) receptors exerts antinociceptive effects at the level of the spinal cord and pronociceptive effects at the periphery. The antinociceptive effect mediated by central 5-HT(7) receptors seems to predominate over the pronociceptive effect at the periphery when a selective 5-HT(7) receptor agonist is systemically administered.
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Affiliation(s)
- A Brenchat
- Department of Pharmacology, Drug Discovery and Preclinical Development, ESTEVE. Av. Mare de Déu de Montserrat, 221, 08041, Barcelona, Spain
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Le Hello C, Morello R, Fradin S, Coffin O, Maïza D, Hamon M. Beware of suboptimal medical management of patients with atherosclerosis requiring revascularization. INT ANGIOL 2012; 31:260-270. [PMID: 22634981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM The aim of this paper was to assess a daily-life evaluation of vascular risk factor control, pharmacological treatment and prognosis in patients with atherosclerosis referred for revascularization. METHODS Prospective observational study conducted in a French University Hospital with collection of atherosclerosis referral site information, reported patient history, documented atherosclerosis sites seen on examination, biological data, and clinical outcomes. RESULTS 956 patients (82.6% men, 64.5±10.1 years) were enrolled for supra-aortic vessel disease (SVD, 24.6%), coronary heart disease (CHD, 40.4%), peripheral artery occlusive disease (PAOD, 34.2%), and visceral artery disease (1.7%). Involvement of >2 vascular territories was documented in 85%. Vascular risk factor frequency results were: previous (65.7%) or current (10.6%) tobacco use, hypertension (64.3%), hyperlipidaemia (75.4%), diabetes (25.8%), overweight (43.8%), and obesity (25.2%). LDL-cholesterol was >100 mg/dL for 38.1%, most frequently seen in patients with PAOD referral (P<0.001) or history (P=0.002), and for 29.2% of the patients taking a statin. HbA1c levels were >6.5% for 53.8% of patients with diabetes. The triple combination of an antiplatelet agent, a statin, and a renin-angiotensin-system inhibitor was not prescribed often enough, especially for PAOD referrals (PAOD referrals, 45.1%; SVD referrals, 48.1%; CHD referrals, 65.9%). Independent risk factors for all-cause mortality were: a previous CHD or PAOD clinical event, body mass index <25 kg/m2, HbA1c >6.5%, and no aspirin treatment. CONCLUSION Even at the time of revascularization, medical management of atherosclerosis was not optimal. The need for continuing education of physicians and patients remains essential.
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Affiliation(s)
- C Le Hello
- Department of Vascular Medicine, CHU of Caen, Caen, France.
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Viguier F, Michot B, Kayser V, Vela J, Hamon M, Bourgoin S. 253 ANTI‐HYPERALGESIC EFFECTS OF 5‐HT7 RECEPTOR ACTIVATION IN RATS SUFFERING FROM NEUROPATHIC PAIN: ROLE OF GABAA RECEPTORS. Eur J Pain 2012. [DOI: 10.1016/s1090-3801(09)60256-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- F. Viguier
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - B. Michot
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - V. Kayser
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | | | - M. Hamon
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - S. Bourgoin
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
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Abstract
In this chapter, from the engineering point of view, we introduce the results from our group and related research on three typical configurations of engineered liver tissues; cell sheet-based tissues, sheet-like macroporous scaffold-based tissues, and tissues based on special scaffolds that comprise a flow channel network. The former two do not necessitate in vitro prevascularization and are thus promising in actual human clinical trials for liver diseases that can be recovered by relatively smaller tissue mass. The third approach can implant a much larger mass but is still not yet feasible. In all cases, oxygen supply is the key engineering factor. For the first configuration, direct oxygen supply using an oxygen-permeable polydimethylsiloxane membrane enables various liver cells to exhibit distinct behaviors, complete double layers of mature hepatocytes and fibroblasts, spontaneous thick tissue formation of hepatocarcinoma cells and fetal hepatocytes. Actual oxygen concentration at the cell level can be strictly controlled in this culture system. Using this property, we found that initially low then subsequently high oxygen concentrations were favorable to growth and maturation of fetal cells. For the second configuration, combination of poly-L: -lactic acid 3D scaffolds and appropriate growth factor cocktails provides a suitable microenvironment for the maturation of cells in vitro but the cell growth is limited to a certain distance from the inner surfaces of the macropores. However, implantation to the mesentery leaves of animals allows the cells again to proliferate and pack the remaining spaces of the macroporous structure, suggesting the high feasibility of 3D culture of hepatocyte progenitors for liver tissue-based therapies. For the third configuration, we proposed a design criterion concerning the dimensions of flow channels based on oxygen diffusion and consumption around the channel. Due to the current limitation in the resolution of 3D microfabrication processes, final cell densities were less than one-tenth of those of in vivo liver tissues; cells preferentially grew along the surfaces of the channels and this fact suggested the necessity of improved 3D fabrication technologies with higher resolution. In any case, suitable oxygen supply, meeting the cellular demand at physiological concentrations, was the most important factor that should be considered in engineering liver tissues. This enables cells to utilize aerobic respiration that produces almost 20 times more ATP from the same glucose consumption than anaerobic respiration (glycolysis). This also allows the cells to exhibit their maximum reorganization capability that cannot be observed in conventional anaerobic conditions.
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Affiliation(s)
- Yasuyuki Sakai
- Institute of Industrial Science, University of Tokyo, Tokyo, Japan.
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Hamon M, Ozawa T, Montagne K, Kojima N, Ishii R, Yamaguchi S, Nagamune T, Ushida T, Sakai Y. Avidin–biotin-based approach to forming heterotypic cell clusters and cell sheets on a gas-permeable membrane. Biofabrication 2011; 3:034111. [DOI: 10.1088/1758-5082/3/3/034111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Hoyle D, Juhasz G, Aso E, Chase D, del Rio J, Fabre V, Hamon M, Lanfumey L, Lesch KP, Maldonado R, Serra MA, Sharp T, Tordera R, Toro C, Deakin JFW. Shared changes in gene expression in frontal cortex of four genetically modified mouse models of depression. Eur Neuropsychopharmacol 2011; 21:3-10. [PMID: 21030216 DOI: 10.1016/j.euroneuro.2010.09.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 09/21/2010] [Accepted: 09/24/2010] [Indexed: 12/01/2022]
Abstract
This study aimed to identify whether genetic manipulation of four systems implicated in the pathogenesis of depression converge on shared molecular processes underpinning depression-like behaviour in mice. Altered 5HT function was modelled using the 5-HT transporter knock out mouse, impaired glucocorticoid receptor (GR) function using an antisense-induced knock down mouse, disrupted glutamate function using a heterozygous KO of the vesicular glutamate transporter 1 gene, and impaired cannabinoid signalling using the cannabinoid 1 receptor KO mouse. All 4 four genetically modified mice were previously shown to show exaggerated helpless behaviour compared to wild-type controls and variable degrees of anxiety and anhedonic behaviour. mRNA was extracted from frontal cortex and hybridised to Illumina microarrays. Combined contrast analysis was used to identify genes showing different patterns of up- and down-regulation across the 4 models. 1823 genes were differentially regulated. They were over-represented in gene ontology categories of metabolism, protein handling and synapse. In each model compared to wild-type mice of the same genetic background, a number of genes showed increased expression changes of >10%, other genes showed decreases in each model. Most of the genes showed mixed effects. Several previous array findings were replicated. The results point to cellular stress and changes in post-synaptic remodelling as final common mechanisms of depression and resilience.
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Affiliation(s)
- D Hoyle
- Faculty of Life Sciences, University of Manchester, Manchester, UK
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Mongeau R, Martin C, Chevarin C, Maldonaldo R, Hamon M, Robledo P, Lanfumey L. S01-04 - 5-HT2C receptor activation inhibits stress-induced increase in 5-HT transmission: relevance to the effects of antidepressant drugs. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)70124-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Postaire E, Pradier F, Postaire M, Pradeau D, Matchoutsky L, Prognon P, Hamon M. Various techniques for the routine evaluation of the degradation of glucose in parenteral solutions--a critical study. J Pharm Biomed Anal 2009; 5:309-18. [PMID: 16867499 DOI: 10.1016/0731-7085(87)80036-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/1986] [Revised: 09/23/1986] [Indexed: 11/30/2022]
Abstract
A practical approach is described for studying the influence of various physicochemical factors on the degradation of glucose in parenteral solutions sterilized by heating in an autoclave. Five routine analytical methods are discussed: pH determination; direct ultraviolet absorption measurement (BP) method; liquid chromatography of 5-HMF; thin-layer chromatography of sugars, carboxylic acids and carbonyl species; and enzymatic determination of glucose. The effects of various factors on the degradation of glucose were studied: glucose concentration (10%, 30%, 50%); pH of solution before sterilization (2-10); sterilization cycle (103 min at 110 degrees C, 20 min at 120 degrees C, 3 min at 134 degrees C; same Fo); time of heating at 120 degrees C (30, 40, 60 min); and the presence of salts (sodium acetate, sodium lactate, sodium chloride). The results demonstrate the importance of these factors in influencing the rate of glucose degradation during sterilization. In the presence of salts, 5-HMF is not the most important product of degradation and the BP assay is not suitable for evaluation of glucose breakdown. The authors propose two control procedures. For simple solutions of glucose, the BP method is suitable. In the presence of salts the glucose oxidase method should be used.
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Affiliation(s)
- E Postaire
- Laboratoire de contrôle de qualité de la Pharmacie centrale des hôpitaux de Paris, 7 rue du Fer à Moulin, 75221 Paris cedex 05, France
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Abstract
The SFR-SFC presents guidelines dedicated to cardiac and coronary imaging using CT in the area of indications, technological requirement including both hardware and software, patient conditioning, CT protocols and related results concerning radiation dose, image quality and diagnostic value. These guidelines are based either on up-dated medical literature proofs and/or on expert consensus.
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Affiliation(s)
- H Vernhet Kovacsik
- Service de Radiologie, Hôpital Arnaud de Villeneuve, 371 Avenue Doyen Gaston Giraud, 34295 Montpellier cedex 05, France.
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Pernès JM, Sirol M, Chabbert V, Christiaens L, Alison D, Hamon M, Caussin C. Les indications actuelles du scanner cardiaque. Archives of Cardiovascular Diseases Supplements 2009. [DOI: 10.1016/s1878-6480(09)70351-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kayser V, Melfort M, Hamon M, Masson J, Bourgoin S. 323 HYPOSENSITIVITY TO NOXIOUS STIMULI AND INCREASED RESPONSE TO MORPHINE IN GLUTAMINASE‐DEFICIENT MICE. Eur J Pain 2009. [DOI: 10.1016/s1090-3801(09)60326-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- V. Kayser
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - M. Melfort
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - M. Hamon
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - J. Masson
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - S. Bourgoin
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
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Michot B, Bourgoin S, Bouzian N, Hamon M, Kayser V. 390 NARATRIPTAN DIFFERENTIALLY ALLEVIATES OXALIPLATIN‐INDUCED NEUROPATHIC PAIN IN CEPHALIC VERSUS EXTRACEPHALIC TERRITORIES IN MICE. Eur J Pain 2009. [DOI: 10.1016/s1090-3801(09)60393-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- B. Michot
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - S. Bourgoin
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - N. Bouzian
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - M. Hamon
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
| | - V. Kayser
- INSERM U894, UPMC, Faculté de Médecine Pierre et Marie Curie, Site Pitié‐Salpêtrière, Paris, France
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